CVR 6 and 7

Card Set Information

Author:
Bobopudge
ID:
76404
Filename:
CVR 6 and 7
Updated:
2011-03-31 09:19:07
Tags:
CVR starling length tension frequency force
Folders:

Description:
nervous control of heart
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  1. These two words, are the difference between maximum cardiac output and resting cardiac output
    Cardiac Reserve
  2. What are the 2 determinants of CO?
    • Heart rate
    • SV
  3. What are the 3 determinants of SV?
    • Preload
    • Afterload
    • Contractility
  4. This is the load on a muscle in the relaxed state
    • Preload
    • It causes the muscle to stretch and develop passive tension
    • Its basically End Diastolic Volume
  5. This is the load on a muscle during contraction
    • Afterload
    • So left ventricular afterload is basically aortic pressure
  6. This is a change in performance at a given preload
    Contractility
  7. What does the frequency-force relationship show?
    • Increasing HR increases Contractility
    • Because more Ca+ activates more cross-bridges
  8. What does Starling's law say?
    • More EDV --> greater force o contraction --> more SV--> more CO
  9. This....This is Frank Starling
  10. Equalization
  11. Nerve supply to the Heart:

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